Process for the preparation of anthraquinone

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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502102, 502162, 502168, 502208, 502508, C07C 5018, B01J 2102, B01J 2114, B01J 2702

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047818620

ABSTRACT:
Anthraquinone is produced by reacting phthalic anhydride in the vapor phase over a catalyst which may be an oxide of the Group 4b metals zirconium, hafnium, and titanium, the Group 5b metals niobium, tantalum, and vanadium, or the rare earths cerium and thorium such oxides, preferably being treated with sulfuric acid and calcined. Substituted anthraquinones may be produced by employing the corresponding substituted phthalic anhydrides.

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Kirk-Othmer, Encyclopedia of Chemical Technology 1978, 3rd ed., vol. 2, pp. 702-707.
Hino, J. Chem. Soc., Chem. Commun., 1985, p. 112.

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